Abstract
A 60-year-old woman was admitted to our hospital for examination of hepatic tumors. Abdominal computed tomography indicated ascending colon cancer and multiple liver metastases, while colonofiberscopy did not reveal a tumor in the ascending colon but detected sigmoid colon cancer. Thus, sigmoid colon resection and ileocecal resection were performed for diagnosis and treatment. On histology, the sigmoid colon cancer was diagnosed as an undifferentiated adenocarcinoma, and the terminal ileal tumor was diagnosed as a neuroendocrine tumor (NET). Postoperatively, the patientʼs serum serotonin level was high, suggesting that the liver metastases had originated from the NET. Because neuroendocrine cell tumor of the terminal ileum is rare, particularly when accompanied by advanced sigmoid colon cancer, we chose to report this case along with a review of the literature.
